3.1 Buick. Changed transmission filter + fluid last night. found 3/8" x about 3" piece of metal in drain pan with a offset V in it. Has a U shape at both ends. I think it got pulled off when I removed the filter. Looks like it fits on 2 pins near filter neck hole on bottom of trans. There is like a metal flap hanging loosely between these 2 pins.(Maybe some type of valve?). I reinstalled the metal piece on the 2 pins with the V putting pressure on the hanging metal flap.(valve). Is this where it goes? Anyone have any pictures of the bottom of transmission showing this area with the filter removed? Thanks. Mike

Thanks, That helps alot. I searched the internet for hours and couldn't find a picture of the bottom of transmission. #17 is the piece I found in my drain pan. It looks like I put it back in the right place. I installed it so it pressing up on #18. Take a worry off of my mine. THANKS